Add XTE-GC to produce XTE w.r.t great circle

SignalK · May 8, 2022 · 0c9b3e8 · 0c9b3e8
1 parent d6fbc22
commit 0c9b3e8
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Showing 2 changed files with 24 additions and 1 deletion.
diff --git a/sentences/XTE-GC.js b/sentences/XTE-GC.js
@@ -0,0 +1,23 @@
+/*
+Cross-track error:
+$IIXTE,A,A,x.x,a,N,A*hh
+ I_Cross-track error in miles, L= left, R= right
+ */
+// to verify
+const nmea = require('../nmea.js')
+module.exports = function (app) {
+  return {
+    title: 'XTE - Cross-track error (w.r.t. Great Circle)',
+    keys: ['navigation.courseGreatCircle.crossTrackError'],
+    f: function (crossTrackError) {
+      return nmea.toSentence([
+        '$IIXTE',
+        'A',
+        'A',
+        nmea.mToNm(crossTrackError).toFixed(3),
+        crossTrackError < 0 ? 'R' : 'L',
+        'N'
+      ])
+    }
+  }
+}
diff --git a/sentences/XTE.js b/sentences/XTE.js
@@ -7,7 +7,7 @@ $IIXTE,A,A,x.x,a,N,A*hh
 const nmea = require('../nmea.js')
 module.exports = function (app) {
   return {
-    title: 'XTE - Cross-track error',
+    title: 'XTE - Cross-track error (w.r.t. Rhumb line)',
     keys: ['navigation.courseRhumbline.crossTrackError'],
     f: function (crossTrackError) {
       return nmea.toSentence([